Tower humidifier



FIG. 1 is a perspective view of a tower humidifier, the images shown in phantom lines do not form part of the invention;

FIG. 2 is a top elevation view of the tower humidifier shown in FIG. 1;

FIG. 3 is a front elevation view of the tower humidifier shown in FIG. 1;

FIG. 4 is a left side elevation view of the tower humidifier shown in FIG. 1;

FIG. 5 is a right side elevation view of the tower humidifier shown in FIG. 1; and,

FIG. 6 is a rear elevation view of the tower humidifier shown in FIG. 1. 

The ornamental design for a tower humidifier, as shown. 